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Interphase and mitosis occur during the cell cycle - Leaving Cert Biology - Question 14(c) - 2022
Question 14(c)
Interphase and mitosis occur during the cell cycle. The process of mitosis occurs over four phases (prophase, metaphase, anaphase and telophase). (i) Describe two e... show full transcript
Worked Solution & Example Answer:Interphase and mitosis occur during the cell cycle - Leaving Cert Biology - Question 14(c) - 2022
Step 1
Describe two events that occur during prophase.
Answer
During prophase, the following events occur:
- The nuclear membrane dissolves, allowing the chromatin to condense and become visible.
- Chromosomes become double-stranded as the DNA duplications are now evident, and they begin to move toward the equatorial plane of the cell.
Step 2
Step 3
Draw a large labelled diagram of a cell with a diploid number of four at anaphase of mitosis.
Answer
The diagram should depict a cell with four chromosomes, each split into two chromatids being pulled apart towards opposite poles of the cell. Labels should include: chromosomes, spindle, equator, poles, and centromere.
Step 4
Describe how cell division occurs in an animal cell and in a plant cell.
Answer
In an animal cell, cell division occurs via cleavage furrow formation, where the membrane pinches inwards to form two daughter cells. In a plant cell, a cell plate forms along the equator of the cell, which develops into a new cell wall, effectively separating the two daughter cells.